user
Write a response that appropriately completes the request.

### Instruction:
Compare and contrast the terms "formal" and "informal"

### Response:
assistant
The terms ‘formal’ and ‘informal’ are both used to describe language. Formal language is more proper, reserved, and polished. It is often used when writing or speaking in a professional or academic setting. In contrast, informal language is less structured, more casual, and more conversational. It is used in day to day conversations and other casual contexts.